Posts Tagged ‘tourmaline necklace’

Facts about Tourmaline: Tourmaline is a crystalline boron-silicate mineral with additional elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gemstone occurs in a wide variety of colors. Tourmaline is actually a group of related varieties rather than a single species. The mineral Elbaite is…